How long does the hail storm last?

Once frozen it starts to fall but gets caught in another strong updraft where it gathers more moisture on its way back up making it larger. If the updrafts are strong enough they will continue this process for long periods of time allowing the hail to accumulate more moisture and more moisture. In a severe thunderstorm downdrafts may act like a wedge and increase the intensity of the updraft. Updrafts can get so strong they even intrude into the stable stratosphere. When updrafts are this strong it becomes possible to suspend large hail for long periods of time further adding moisture to the hail, sometimes building it to incredible sizes. Updraft winds can be from 100 to 120 miles per hour when producing Baseball and larger size hail.

The hailstone will keep rising in the thunderstorm until its mass can no longer be supported by the updraft. This may take at least 30 minutes based on the force of the updrafts in the hail-producing thunderstorm, whose top is usually greater than 10 km high. It then falls toward the ground while continuing to grow, based on the same processes, until it leaves the cloud. It will later begin to melt as it passes into air above freezing temperature